Code of Federal Regulations Title 33. Navigation and Navigable Waters § 33.117.1061 Tacoma Harbor

(a) When fog prevails by day or night, the drawtender of each bridge listed in this section, after giving the acknowledging signal to open, shall toll a bell continuously during the approach and passage of vessels.

(b) The draw of the Murray Morgan Bridge, also known as the South 11th Street Bridge, across Thea Foss Waterway, previously known as City Waterway, mile 0.6, at Tacoma, shall open on signal if at least two hours notice is given. However, to obtain a bridge opening between 10 p.m. and 8 a.m. notification must be made to the City of Tacoma by 8 p.m. In emergencies, openings shall be made as soon as possible upon notification to the City of Tacoma.